(2) 1450- 1850 is the gestation period of world advertising. After the invention of metal movable type printing, it provided conditions for the development of printing advertising and created a new era of advertising. However, because newspapers and magazines were not distributed in large quantities during this period, the scope of printing advertisements was extremely limited.
(3) The period from1850 to 1920 is a transitional period from modern advertising to modern advertising in the world. Due to the wide application of new technology, advertising forms are diversified, and the world advertising center has moved from Britain to the United States.
(4) After1920, the world advertising industry entered an epoch-making development stage. Advertising media emerge one after another, and advertising has entered a period of modern development from modern times.